Need help with junior prom pre-prom party

We have had several parties at our house for our son’s during the last two years of high school birthday parties cookie exchange party Pre-Ring dance party New Year’s Eve parties. I’ve never done a pre-prom party before and I’m feeling a little anxious because I have no idea where to start.
All of the guys and girls will be dressed up so I can’t really plan for any games either outdoor or indoor the prom ticket includes a Served dinner and there will be photos taken at prom so all of the ideas I’m coming up with wil sort of already be covered.
I had not even really thought about a pre-prom party except that I went to a school fundraiser and at our table of 10 two or three of the moms of my sons really good friends very much directly hinted that I was the one hosting pre-prom. Thats really fine with me I’m happy to do it and I would like to provide a time before the prom for all of the parents to gather and get to know each other just a little bit before our kids had off to the dance together but I’m just trying to figure out what to do with the kids I know they’re very good at occupying their own time at this age but I don’t really want to have all the kids just wandering around dressed up with nothing to do. I really do want them to have a good time and I really will miss them when they all head off to college no one’s really planning on staying terribly close so I wanted to be a fun evening for everybody. It will probably be a total of 16 to 20 kids. Help! Thank you.

Enlist the other moms to help. I am sure they would be happy to! I know I would be so grateful that you were willing to host, that I would be happy to help with the arrangements and planning and stuff. They probably have ideas about what they want it to be, since they suggested it. As for an activity, I’d suggest a photo booth or photo location thing, where you set up a few different backdrops and let them take pictures.

I’m thinking finger foods (no sauces to save the dresses!) and a photo booth?

Thank you ccpro and threebeans. I like the idea of enlisting help. I feel a little awkward asking people to bring stuff since I’m hosting but they may enjoy making a favorite dish. I was worried a photo booth would be redundant since there will be one at prom but I guess it can still be fun. I was thinking of asking parents to send me photos of their proms and making a slideshow so the kids can see the “olden days”. Thank you again for your help!

For the pre-prom party I attended they invited the kids and the parents. There was finger foods and mingling and at some point it was “picture time” and everyone went outside for the parents to take pictures.